Astronomický Ústav SAV Správa O

Total Page:16

File Type:pdf, Size:1020Kb

Astronomický Ústav SAV Správa O Astronomický ústav SAV Správa o činnosti organizácie SAV za rok 2014 Tatranská Lomnica január 2015 Obsah osnovy Správy o činnosti organizácie SAV za rok 2014 1. Základné údaje o organizácii 2. Vedecká činnosť 3. Doktorandské štúdium, iná pedagogická činnosť a budovanie ľudských zdrojov pre vedu a techniku 4. Medzinárodná vedecká spolupráca 5. Vedná politika 6. Spolupráca s VŠ a inými subjektmi v oblasti vedy a techniky 7. Spolupráca s aplikačnou a hospodárskou sférou 8. Aktivity pre Národnú radu SR, vládu SR, ústredné orgány štátnej správy SR a iné organizácie 9. Vedecko-organizačné a popularizačné aktivity 10. Činnosť kniţnično-informačného pracoviska 11. Aktivity v orgánoch SAV 12. Hospodárenie organizácie 13. Nadácie a fondy pri organizácii SAV 14. Iné významné činnosti organizácie SAV 15. Vyznamenania, ocenenia a ceny udelené pracovníkom organizácie SAV 16. Poskytovanie informácií v súlade so zákonom o slobodnom prístupe k informáciám 17. Problémy a podnety pre činnosť SAV PRÍLOHY A Zoznam zamestnancov a doktorandov organizácie k 31.12.2014 B Projekty riešené v organizácii C Publikačná činnosť organizácie D Údaje o pedagogickej činnosti organizácie E Medzinárodná mobilita organizácie Správa o činnosti organizácie SAV 1. Základné údaje o organizácii 1.1. Kontaktné údaje Názov: Astronomický ústav SAV Riaditeľ: RNDr. Aleš Kučera, CSc. Zástupca riaditeľa: doc. RNDr. Ján Svoreņ, DrSc. Vedecký tajomník: Mgr. Martin Vaņko, PhD. Predseda vedeckej rady: RNDr. Theodor Pribulla, CSc. Člen snemu SAV: RNDr. Richard Komţík, CSc. Adresa: Astronomický ústav SAV, 059 60 Tatranská Lomnica http://www.ta3.sk Tel.: 052/7879111 Fax: 052/4467656 E-mail: [email protected] Názvy a adresy detašovaných pracovísk: Astronomický ústav - Oddelenie medziplanetárnej hmoty Dúbravská cesta 9, 845 04 Bratislava Vedúci detašovaných pracovísk: Astronomický ústav - Oddelenie medziplanetárnej hmoty Prof. RNDr. Vladimír Porubčan, DrSc. Typ organizácie: Rozpočtová od roku 1953 1.2. Údaje o zamestnancoch Tabuľka 1a Počet a štruktúra zamestnancov K K do 35 Štruktúra zamestnancov K rokov F P T M Ţ M Ţ Celkový počet zamestnancov 55 38 17 6 4 54 49,92 30,37 Vedeckí pracovníci 30 25 5 4 3 29 26,22 24,22 Odborní pracovníci VŠ 11 7 4 2 0 11 10,49 6,15 Odborní pracovníci ÚS 5 2 3 0 1 5 5,97 0 Ostatní pracovníci 9 4 5 0 0 9 7,24 0 K – kmeňový stav zamestnancov v pracovnom pomere k 31.12.2014 (uvádzať zamestnancov v pracovnom pomere, vrátane riadnej materskej dovolenky, zamestnancov pôsobiacich v zahraničí, v štátnych funkciách, členov Predsedníctva SAV, zamestnancov pôsobiacich v zastupiteľských zboroch) F – fyzický stav zamestnancov k 31.12.2014 (bez riadnej materskej dovolenky, zamestnancov pôsobiacich v zahraničí v štátnych funkciách, členov Predsedníctva SAV, zamestnancov pôsobiacich v zastupiteľských zboroch) P – celoročný priemerný prepočítaný počet zamestnancov T – celoročný priemerný prepočítaný počet riešiteľov projektov 1 Správa o činnosti organizácie SAV M, Ţ – muţi, ţeny Tabuľka 1b Štruktúra vedeckých pracovníkov (kmeņový stav k 31.12.2014) Rodová Pracovníci s hodnosťou Vedeckí pracovníci v stupňoch skladba DrSc. CSc./PhD. prof. doc. I. IIa. IIb. Muţi 6 19 1 1 6 11 8 Ţeny 0 5 0 0 0 1 4 Tabuľka 1c Štruktúra pracovníkov podľa veku a rodu, ktorí sú riešiteľmi projektov Veková štruktúra < 31 31-35 36-40 41-45 46-50 51-55 56-60 61-65 > 65 (roky) Muţi 1 5 4 2 2 5 3 2 3 Ţeny 3 1 0 1 1 0 0 0 1 Tabuľka 1d Priemerný vek zamestnancov organizácie k 31.12.2014 Kmeňoví zamestnanci Vedeckí pracovníci Riešitelia projektov Muţi 49,6 49,4 48,3 Ţeny 44,4 34,4 40,3 Spolu 48,0 46,9 46,6 1.3. Iné dôleţité informácie k základným údajom o organizácii a zmeny za posledné obdobie (v zameraní, v organizačnej štruktúre a pod.) 2 Správa o činnosti organizácie SAV 2. Vedecká činnosť 2.1. Domáce projekty Tabuľka 2a Počet domácich projektov riešených v roku 2014 Čerpané financie Počet projektov za rok 2014 (v €) ŠTRUKTÚRA PROJEKTOV A A B pre B spolu organi- záciu 1. Vedecké projekty, ktoré boli 7 1 74523 74523 4031 r. 2014 financované VEGA 2. Projekty, ktoré boli r. 2014 2 2 55644 55644 5502 financované APVV 3. Projekty OP ŠF 2 0 2259797 2046325 - 4. Projekty centier excelentnosti SAV 0 0 - - - 5. Iné projekty (FM EHP, ŠPVV, Vedecko-technické projekty, ESF, 0 0 - - - na objednávku rezortov a pod.) A - organizácia je nositeľom projektu B - organizácia sa zmluvne podieľa na riešení projektu Tabuľka 2b Počet návrhov domácich projektov podaných v roku 2014 Štruktúra projektov Miesto podania Organizácia je Organizácia sa nositeľom zmluvne podieľa projektu na riešení projektu 1. Účasť na nových výzvach APVV - r. 2014 2. Projekty výziev OP ŠF Bratislava podané r. 2014 Regióny 3 Správa o činnosti organizácie SAV 2.2. Medzinárodné projekty 2.2.1. Medzinárodné projekty riešené v roku 2014 Tabuľka 2c Počet medzinárodných projektov riešených v roku 2014 Čerpané financie Počet projektov za rok 2014 (v €) ŠTRUKTÚRA PROJEKTOV A A B pre B spolu organi- záciu 1. Projekty 7. Rámcového programu EÚ 2 1 90969 90969 23470 2. Multilaterálne projekty v rámci vedeckých programov COST, ERANET, INTAS, EUREKA, 0 2 - - 2344 ESPRIT, PHARE, NATO, UNESCO, CERN, IAEA, ESF (European Science Foundation), ERDF a iné 3. Projekty v rámci medzivládnych dohôd o vedecko-technickej 1 0 4000 2000 - spolupráci 4. Bilaterálne projekty 5 2 68889 3567 5717 5. Podpora medzinárodnej spolupráce z národných zdrojov 0 3 - - 10666 (MVTS, APVV,...) 6. Iné projekty financované alebo spolufinancované zo zahraničných 0 0 - - - zdrojov A - organizácia je nositeľom projektu B - organizácia sa zmluvne podieľa na riešení projektu 2.2.2. Medzinárodné projekty v 7. RP EÚ a Horizont 2020 podané v roku 2014 Tabuľka 2d Počet projektov 7. RP EÚ a Horizont 2020 v roku 2014 A B Počet podaných projektov v 7. RP EÚ Počet podaných projektov 1 Horizont 2020 A - organizácia je nositeľom projektu B - organizácia sa zmluvne podieľa na riešení projektu Údaje k domácim a medzinárodným projektom sú uvedené v Prílohe B. 2.2.3. Zámery na čerpanie štrukturálnych fondov EÚ v ďalších výzvach Astronomický ústav SAV sa bude uchádzať o ŠF aj vo výzvach pre obdobie 2014-2020. 4 Správa o činnosti organizácie SAV 2.3. Najvýznamnejšie výsledky vedeckej práce 2.3.1. Základný výskum 1. Výsledok Modelovanie štruktúry a magnetického poľa pokojnej slnečnej protuberancie pomocou teórie prenosu ţiarenia (P. Schwartz). Detailnou analýzou multi-spektrálnych pozorovaní (v röntgenovskej, EUV a viditeľnej oblasti spektra) pokojnej slnečnej protuberancie vykonaných 22. júna 2010 na prístrojoch na druţiciach SDO a Hinode a následnou 3D bezsilovou rekonštrukciou jej magnetického poľa a non-LTE prenosom ţiarenia v 2D geometrii bolo zistené, ţe plazma prechodovej oblasti medzi korónou a protuberanciou (teploty 50 tisíc -100 tisíc K) sa nachádza v priehlbinách magnetických slučiek maloškálových štruktúr rozmiestnených okolo centrálnej osi protuberancie vyplnenej chladnou plazmou (teplota okolo 10000 K). Okrem toho sme fyzikálne vysvetlili prítomnosť tmavých bublín v jasnej protuberancii perturbáciami vo vertikálnej jemnej magnetickej štruktúre protuberancie. Magnetic field and radiative transfer modelling of a structure of quiescent prominence Projekty: VEGA 2/0108/12, APVV-0816-11 Práca: GUNÁR, Stanislav - SCHWARTZ, Pavol - DUDÍK, Jaroslav - SCHMIEDER, Brigitte - HEINZEL, Petr - JURČÁK, Ján. Magnetic field and radiative transfer modelling of a quiescent prominence. In Astronomy and Astrophysics, 2014, vol. 567, article no. A123, p. 1-16. (4.479 - IF2013). (2014 - Current Contents, SCOPUS, NASA ADS). ISSN 0004-6361. 2.3.3. Medzinárodné vedecké projekty 1. Výsledok Ranné štádium vývoja mimoriadnej Novy Delphini 2013 (V339 Del) (A. Skopal). Jav novy je výsledkom explozívnej termonukleárnej fúzie vodíka na hélium v povrchovej vrstve bieleho trpaslíka (BT). Palivom tohto procesu je vodíkový materiál, ktorý je ukladaný na povrch BT z jeho súputníka v dvojhviezde. Keď tlak pri základni nahromadenej vrstvy dosiahne kritickú hodnotu, protóny začnú vytvárať jadrá hélia pričom sa uvoľņuje 6,3x1011 Joulov z 1 gramu vodíka. Súčasné teoretické modely tohto javu predpokladajú, ţe celková svietivosť niektorých nov môţe na krátky čas po explózii presiahnuť aj tzv. eddingtonovskú svietivosť, pri ktorej svietivá energia vyvaţuje gravitačnú silu objektu. Nova Delphini 2013 (V339 Del) bola objavená 14. augusta 2013. Modelovaním rozdelenia energie v spektre novy od jej objavu aţ po prvú detekciu X-ţiarenia (40. deņ po maxime jasnosti), sme zistili, ţe celková svietivosť novy niekoľkonásobne presahovala odpovedajúcu Eddingtonovu hodnotu. Vysoká kadencia našich spektier umoţnila určiť trvanie fázy tzv. ţeravej gule do 20. augusta, kedy sa spektrum novy dramaticky zmenilo. Behom jedného dņa sa maximum vyţarovania novy presunulo do UV oblasti, pričom v optickom/IR spektre sme pozorovali extrémny nárast ţiarenia hmloviny. Odpovedajúci emisný objem 1-2x1062 cm-3 vyţadoval, aby horiaci BT produkoval aţ desaťnásobok kritickej eddingtonovskej svietivosti. Naša podrobná analýza vývoja novy, od niekoľkých hodín po jej výbuchu aţ po prvú detekciu X-ţiarenia, ukázala, ţe nova sa nevyvíjala v súlade so súčasnými teoretickými predpokladmi. Nezvyčajná sféricky nesymetrická ejekcia hmoty novy V339 Del a jej extrémne fyzikálne podmienky počas a po fáze ţeravej gule predstavujú zaujímavú novú výzvu pre teoretické modelovanie fascinujúceho javu novy. Early evolution of the extraordinary Nova Delphini 2013 (V339 Del). Projekt Nadácie Alexandra von Humboldta č. SLA/1039115 a VEGA č. 2/0002/13. Práca ADCA26: SKOPAL, Augustín - DRECHSEL,
Recommended publications
  • Ultraviolet and Visual Flux and Line Variations of One of the Least Variable Bp Stars HD 64740
    Astronomy & Astrophysics manuscript no. hd64740 c ESO 2018 August 28, 2018 Ultraviolet and visual flux and line variations of one of the least variable Bp stars HD 64740⋆ J. Krtiˇcka1, J. Jan´ık1, H. Markov´a1, Z. Mikul´aˇsek1,2, J. Zverko1, M. Prv´ak1, and M. Skarka1 1 Department of Theoretical Physics and Astrophysics, Masaryk University, Kotl´aˇrsk´a2, CZ-611 37 Brno, Czech Republic 2 Observatory and Planetarium of J. Palisa, VSBˇ – Technical University, Ostrava, Czech Republic Received ABSTRACT Context. The light variability of hot magnetic chemically peculiar stars is typically caused by the flux redistribution in spots with peculiar abundance. This raises the question why some stars with surface abundance spots show significant rotational light variability, while others do not. Aims. We study the Bp star HD 64740 to investigate how its remarkable inhomogeneities in the surface distribution of helium and silicon, and the corresponding strong variability of many spectral lines, can result in one of the faintest photometric variabilities among the Bp stars. Methods. We used model atmospheres and synthetic spectra calculated for the silicon and helium abundances from surface abundance maps to predict the ultraviolet and visual light and line variability of HD 64740. The predicted fluxes and line profiles were compared with the observed ones derived with the IUE, HST, and Hipparcos satellites and with spectra acquired using the FEROS spectrograph at the 2.2m MPG/ESO telescope in La Silla. Results. We are able to reproduce the observed visual light curve of HD 64740 assuming an inhomogeneous distribution of iron correlated with silicon distribution.
    [Show full text]
  • II Publications, Presentations
    II Publications, Presentations 1. Refereed Publications Izumi, K., Kotake, K., Nakamura, K., Nishida, E., Obuchi, Y., Ohishi, N., Okada, N., Suzuki, R., Takahashi, R., Torii, Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, Y., Ueda, A., Yamazaki, T.: 2010, DECIGO and DECIGO Search for Gravitational-wave Inspiral Signals Associated with pathfinder, Class. Quantum Grav., 27, 084010. Short Gamma-ray Bursts During LIGO's Fifth and Virgo's First Aoki, K.: 2010, Broad Balmer-Line Absorption in SDSS Science Run, ApJ, 715, 1453-1461. J172341.10+555340.5, PASJ, 62, 1333. Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, All- Aoki, K., Oyabu, S., Dunn, J. P., Arav, N., Edmonds, D., Korista sky search for gravitational-wave bursts in the first joint LIGO- K. T., Matsuhara, H., Toba, Y.: 2011, Outflow in Overlooked GEO-Virgo run, Phys. Rev. D, 81, 102001. Luminous Quasar: Subaru Observations of AKARI J1757+5907, Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, PASJ, 63, S457. Search for gravitational waves from compact binary coalescence Aoki, W., Beers, T. C., Honda, S., Carollo, D.: 2010, Extreme in LIGO and Virgo data from S5 and VSR1, Phys. Rev. D, 82, Enhancements of r-process Elements in the Cool Metal-poor 102001. Main-sequence Star SDSS J2357-0052, ApJ, 723, L201-L206. Abadie, J., et al. including Hayama, K., Kawamura, S.: 2010, Arai, A., et al. including Yamashita, T., Okita, K., Yanagisawa, TOPICAL REVIEW: Predictions for the rates of compact K.: 2010, Optical and Near-Infrared Photometry of Nova V2362 binary coalescences observable by ground-based gravitational- Cyg: Rebrightening Event and Dust Formation, PASJ, 62, wave detectors, Class.
    [Show full text]
  • A Photometric and Spectroscopic Study of the Cataclysmic Variable Sx Leonis Minoris in Quiescence and Superoutburst1 R
    THE ASTRONOMICAL JOURNAL, 115:787È800, 1998 February ( 1998. The American Astronomical Society. All rights reserved. Printed in U.S.A. A PHOTOMETRIC AND SPECTROSCOPIC STUDY OF THE CATACLYSMIC VARIABLE SX LEONIS MINORIS IN QUIESCENCE AND SUPEROUTBURST1 R. MARK WAGNER,2 JOHN R.THORSTENSEN,3 R. K.HONEYCUTT,4 S. B.HOWELL,5 R. H. KAITCHUCK,6 T. J.KREIDL,7 J. W.ROBERTSON,4 E. M. SION,8 AND S. G. STARRFIELD9 Received 1996 December 17; revised 1997 October 27 ABSTRACT We present CCD imaging, CCD photometry on long and short timescales, and time-resolved spectros- copy of SX LMi, a new SU Ursae Majoris type dwarf nova. The quiescent optical spectrum shows broad double-peaked Balmer, He I, and He II emission lines, similar to other quiescent dwarf novae. Absorption lines from a late-type secondary are not detected. Time-resolved spectra obtained in quies- cence reveal radial velocity variations of the Balmer emission lines on a period of 0.06717 ^ 0.00011 days, or 96.72 ^ 0.16 minutes, with only a slight possibility of a daily cycle-count error. Optical photometry obtained between 1987 and 1991 shows Ñickering with a peak-to-peak amplitude of ^0.18 mag. The binary orbital period can sometimes be seen in the photometric record. Long-term photometric monitor- ing by Indiana UniversityÏs robotic telescope RoboScope for a 3 year period between 1992 October and 1995 June shows seven well-deÐned outbursts and marginally detects a few others. The outburst interval varies between 34 and 64 days. During the 1994 December outburst, optical photometric observations show that SX LMi exhibited superhumps with a period of 0.06893 ^ 0.00012 days, which is 2.6% ^ 0.2% longer than the orbital period, as expected for a normal SU UMa star at this period.
    [Show full text]
  • Variable Star Classification and Light Curves Manual
    Variable Star Classification and Light Curves An AAVSO course for the Carolyn Hurless Online Institute for Continuing Education in Astronomy (CHOICE) This is copyrighted material meant only for official enrollees in this online course. Do not share this document with others. Please do not quote from it without prior permission from the AAVSO. Table of Contents Course Description and Requirements for Completion Chapter One- 1. Introduction . What are variable stars? . The first known variable stars 2. Variable Star Names . Constellation names . Greek letters (Bayer letters) . GCVS naming scheme . Other naming conventions . Naming variable star types 3. The Main Types of variability Extrinsic . Eclipsing . Rotating . Microlensing Intrinsic . Pulsating . Eruptive . Cataclysmic . X-Ray 4. The Variability Tree Chapter Two- 1. Rotating Variables . The Sun . BY Dra stars . RS CVn stars . Rotating ellipsoidal variables 2. Eclipsing Variables . EA . EB . EW . EP . Roche Lobes 1 Chapter Three- 1. Pulsating Variables . Classical Cepheids . Type II Cepheids . RV Tau stars . Delta Sct stars . RR Lyr stars . Miras . Semi-regular stars 2. Eruptive Variables . Young Stellar Objects . T Tau stars . FUOrs . EXOrs . UXOrs . UV Cet stars . Gamma Cas stars . S Dor stars . R CrB stars Chapter Four- 1. Cataclysmic Variables . Dwarf Novae . Novae . Recurrent Novae . Magnetic CVs . Symbiotic Variables . Supernovae 2. Other Variables . Gamma-Ray Bursters . Active Galactic Nuclei 2 Course Description and Requirements for Completion This course is an overview of the types of variable stars most commonly observed by AAVSO observers. We discuss the physical processes behind what makes each type variable and how this is demonstrated in their light curves. Variable star names and nomenclature are placed in a historical context to aid in understanding today’s classification scheme.
    [Show full text]
  • Prof. Tansel AK
    Prof. Tansel AK OPfefricseo Pnhaol nIen:f +or9m0 2a1t2io 4n40 0000 Extension: 10296 EFmaxa iPl:h otannes:e l+ak9@0 i2st1a2n b4u4l0.e 0d3u7.t0r AWdedbr:e hstst:p :İ/s/tawnwbuwl. iÜstnainvebrusli.etedsui .Ftre/nfe Fna/kpüelrtessoin Aeslatrkoanfeonm.pi hvpe? Uidz=ay2 6B9ilimleri Bölümü, 34119, Üniversite, Beyazıt, İstanbul EDodcutocraatteio, İnst aInnbfuol rÜmniavetriosintesi, Institute of Graduate Studies In Sciences, Astronomi Ve Uzay Bilimleri Anabilim Dalı, PTousrtkgerya d1u9a9t2e ,- İ1st9a9n9bul Üniversitesi, Institute of Graduate Studies In Sciences, Astronomi Ve Uzay Bilimleri Anabilim Dalı, UTunrdkeeryg r1a9d9u0a t-e 1, 9İs9ta2nbul Üniversitesi, Faculty of Science, Astronomy and Space Sciences, Turkey 1983 - 1990 FEnogrliesihg, nB2 L Uapnpgeru Iangteersmediate Dissertations ADsotcrtoonroamtei, CVüec Uez Nayo vBaillaimrılne rUi zAunna Dbiölinme mDalil ıD, 1av9r9a9nışları, Istanbul University, Institute of Graduate Studies In Sciences, SPcoisetngcreasd, uYaıltdeı,z K Aatmakolissfmerilke rDi ePğrioşegnra DmQı, H1e9r9 2Yıldızının Morötesi Tayfı, Istanbul University, Institute of Graduate Studies In RPheysseicas,r Acshtr Aonroemays and Astrophysics, Astronomy and Astrophysics: Instrumentation Techniques and Observations, Star Scyisetnecmess, Interstellar Medium, The Galaxy, Galactic and Extragalactic Objets and Systems, Cosmology, Stars, Natural Academic Titles / Tasks APrsosofecsiastoer ,P Irsotafensbsuolr U, Insitvaenrbsuitly U, Fnaivceurltsyit yo,f FSaccieunltcye o, Af sStcrioencoem, Ay satnrodn Sopmacye a Sncdie Snpcaecse, 2S0c1ie2n
    [Show full text]
  • Permanent Superhumps in V1974 Cyg 3
    Mon. Not. R. Astron. Soc. 000, 1–?? (1997) Printed 15 September 2018 (MN LaTEX style file v1.4) Permanent Superhumps in Nova V1974 Cygni 1992 A. Retter,1 E.M. Leibowitz and E.O. Ofek School of Physics and Astronomy and the Wise Observatory, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv, 69978, Israel 1 email: [email protected] accepted 1996 November 4 ABSTRACT We present results of 32 nights of CCD photometry of V1974 Cygni, from the years 1994 and 1995. We verify the presence of two distinct periodicities in the light curve: 0.0812585 day ≈ 1.95 hours and 0.0849767 d ≈ 2.04 hr. We establish that the shorter periodicity is the orbital period of the underlying binary system. The longer period oscillates with an average value of |P˙ |∼ 3 × 10−7—typical to permanent superhumps. The two periods obey the linear relation between the orbital and superhump periods that holds among members of the SU Ursae Majoris class of dwarf novae. A third periodicity of 0.083204 d ≈ 2.00 hr appeared in 1994 but not in 1995. It may be related to the recently discovered anti-superhump phenomenon. These results suggest a linkage between the classical nova V1974 Cyg and the SU UMa stars, and indicate the existence of an accretion disk and permanent superhumps in the system no later than 30 months after the nova outburst. From the precessing disk model of the superhump phenomenon we estimate that the mass ratio in the binary system is between 2.2 and 3.6.
    [Show full text]
  • Gaia Data Release 2 Special Issue
    A&A 623, A110 (2019) Astronomy https://doi.org/10.1051/0004-6361/201833304 & © ESO 2019 Astrophysics Gaia Data Release 2 Special issue Gaia Data Release 2 Variable stars in the colour-absolute magnitude diagram?,?? Gaia Collaboration, L. Eyer1, L. Rimoldini2, M. Audard1, R. I. Anderson3,1, K. Nienartowicz2, F. Glass1, O. Marchal4, M. Grenon1, N. Mowlavi1, B. Holl1, G. Clementini5, C. Aerts6,7, T. Mazeh8, D. W. Evans9, L. Szabados10, A. G. A. Brown11, A. Vallenari12, T. Prusti13, J. H. J. de Bruijne13, C. Babusiaux4,14, C. A. L. Bailer-Jones15, M. Biermann16, F. Jansen17, C. Jordi18, S. A. Klioner19, U. Lammers20, L. Lindegren21, X. Luri18, F. Mignard22, C. Panem23, D. Pourbaix24,25, S. Randich26, P. Sartoretti4, H. I. Siddiqui27, C. Soubiran28, F. van Leeuwen9, N. A. Walton9, F. Arenou4, U. Bastian16, M. Cropper29, R. Drimmel30, D. Katz4, M. G. Lattanzi30, J. Bakker20, C. Cacciari5, J. Castañeda18, L. Chaoul23, N. Cheek31, F. De Angeli9, C. Fabricius18, R. Guerra20, E. Masana18, R. Messineo32, P. Panuzzo4, J. Portell18, M. Riello9, G. M. Seabroke29, P. Tanga22, F. Thévenin22, G. Gracia-Abril33,16, G. Comoretto27, M. Garcia-Reinaldos20, D. Teyssier27, M. Altmann16,34, R. Andrae15, I. Bellas-Velidis35, K. Benson29, J. Berthier36, R. Blomme37, P. Burgess9, G. Busso9, B. Carry22,36, A. Cellino30, M. Clotet18, O. Creevey22, M. Davidson38, J. De Ridder6, L. Delchambre39, A. Dell’Oro26, C. Ducourant28, J. Fernández-Hernández40, M. Fouesneau15, Y. Frémat37, L. Galluccio22, M. García-Torres41, J. González-Núñez31,42, J. J. González-Vidal18, E. Gosset39,25, L. P. Guy2,43, J.-L. Halbwachs44, N. C. Hambly38, D.
    [Show full text]
  • Stars and Their Spectra: an Introduction to the Spectral Sequence Second Edition James B
    Cambridge University Press 978-0-521-89954-3 - Stars and Their Spectra: An Introduction to the Spectral Sequence Second Edition James B. Kaler Index More information Star index Stars are arranged by the Latin genitive of their constellation of residence, with other star names interspersed alphabetically. Within a constellation, Bayer Greek letters are given first, followed by Roman letters, Flamsteed numbers, variable stars arranged in traditional order (see Section 1.11), and then other names that take on genitive form. Stellar spectra are indicated by an asterisk. The best-known proper names have priority over their Greek-letter names. Spectra of the Sun and of nebulae are included as well. Abell 21 nucleus, see a Aurigae, see Capella Abell 78 nucleus, 327* ε Aurigae, 178, 186 Achernar, 9, 243, 264, 274 z Aurigae, 177, 186 Acrux, see Alpha Crucis Z Aurigae, 186, 269* Adhara, see Epsilon Canis Majoris AB Aurigae, 255 Albireo, 26 Alcor, 26, 177, 241, 243, 272* Barnard’s Star, 129–130, 131 Aldebaran, 9, 27, 80*, 163, 165 Betelgeuse, 2, 9, 16, 18, 20, 73, 74*, 79, Algol, 20, 26, 176–177, 271*, 333, 366 80*, 88, 104–105, 106*, 110*, 113, Altair, 9, 236, 241, 250 115, 118, 122, 187, 216, 264 a Andromedae, 273, 273* image of, 114 b Andromedae, 164 BDþ284211, 285* g Andromedae, 26 Bl 253* u Andromedae A, 218* a Boo¨tis, see Arcturus u Andromedae B, 109* g Boo¨tis, 243 Z Andromedae, 337 Z Boo¨tis, 185 Antares, 10, 73, 104–105, 113, 115, 118, l Boo¨tis, 254, 280, 314 122, 174* s Boo¨tis, 218* 53 Aquarii A, 195 53 Aquarii B, 195 T Camelopardalis,
    [Show full text]
  • CCD Photometry of Nova V1500 Cygni Twenty Years After I
    ACTA ASTRONOMICA Vol. 45 (1995) pp. 747±752 CCD Photometry of Nova V1500 Cygni Twenty Years After by I. S e m e n i u k, A. O l e c h and M. Nale zÇ y t y Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland e-mail:(is,olech,nalezyty)@sirius.astrouw.edu.pl Received December 1, 1995 ABSTRACT We report on CCD photometry of Nova V1500 Cygni obtained in July 1995 to show that twenty years after outburst, being of about 18 mag, the star can still be observed with small telescopes. The 0.1396 day period continues to be stable. Key words: Stars: individual: V1500 Cyg ± binaries: close ± novae, cataclysmic variables 1. Introduction V1500 Cygni (Nova Cygni 1975), the brightest, fastest and the most intriguing nova of the last twenty years, faded now to 18 mag. However, despite of its faint- ness, it still appears to be an object suitable for observations with small telescopes, and this is possible due to the CCD technique. The nova is still worthwhile to be observed. Twelve years after its outburst, polarimetric observations (Stockman, Schmidt and Lamb 1988) revealed that the object was an intermediate polar with the spin period Pspin of its white dwarf component being about 2% shorter than the orbital period Porb equal to 0.1396 days. Subsequently, the spin period appeared to be increasing (Schmidt and Stockman 1991, Schmidt, Liebert and Stockman 1995) with the rate of increase indicating synchronization of the rotational and orbital motions in about 170 years. On this time-scale the star will be returning to its pre-outburst AM Herculis state.
    [Show full text]
  • Astrophysics in 2006 3
    ASTROPHYSICS IN 2006 Virginia Trimble1, Markus J. Aschwanden2, and Carl J. Hansen3 1 Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575, Las Cumbres Observatory, Santa Barbara, CA: ([email protected]) 2 Lockheed Martin Advanced Technology Center, Solar and Astrophysics Laboratory, Organization ADBS, Building 252, 3251 Hanover Street, Palo Alto, CA 94304: ([email protected]) 3 JILA, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder CO 80309: ([email protected]) Received ... : accepted ... Abstract. The fastest pulsar and the slowest nova; the oldest galaxies and the youngest stars; the weirdest life forms and the commonest dwarfs; the highest energy particles and the lowest energy photons. These were some of the extremes of Astrophysics 2006. We attempt also to bring you updates on things of which there is currently only one (habitable planets, the Sun, and the universe) and others of which there are always many, like meteors and molecules, black holes and binaries. Keywords: cosmology: general, galaxies: general, ISM: general, stars: general, Sun: gen- eral, planets and satellites: general, astrobiology CONTENTS 1. Introduction 6 1.1 Up 6 1.2 Down 9 1.3 Around 10 2. Solar Physics 12 2.1 The solar interior 12 2.1.1 From neutrinos to neutralinos 12 2.1.2 Global helioseismology 12 2.1.3 Local helioseismology 12 2.1.4 Tachocline structure 13 arXiv:0705.1730v1 [astro-ph] 11 May 2007 2.1.5 Dynamo models 14 2.2 Photosphere 15 2.2.1 Solar radius and rotation 15 2.2.2 Distribution of magnetic fields 15 2.2.3 Magnetic flux emergence rate 15 2.2.4 Photospheric motion of magnetic fields 16 2.2.5 Faculae production 16 2.2.6 The photospheric boundary of magnetic fields 17 2.2.7 Flare prediction from photospheric fields 17 c 2008 Springer Science + Business Media.
    [Show full text]
  • Arxiv:0908.2624V1 [Astro-Ph.SR] 18 Aug 2009
    Astronomy & Astrophysics Review manuscript No. (will be inserted by the editor) Accurate masses and radii of normal stars: Modern results and applications G. Torres · J. Andersen · A. Gim´enez Received: date / Accepted: date Abstract This paper presents and discusses a critical compilation of accurate, fun- damental determinations of stellar masses and radii. We have identified 95 detached binary systems containing 190 stars (94 eclipsing systems, and α Centauri) that satisfy our criterion that the mass and radius of both stars be known to ±3% or better. All are non-interacting systems, so the stars should have evolved as if they were single. This sample more than doubles that of the earlier similar review by Andersen (1991), extends the mass range at both ends and, for the first time, includes an extragalactic binary. In every case, we have examined the original data and recomputed the stellar parameters with a consistent set of assumptions and physical constants. To these we add interstellar reddening, effective temperature, metal abundance, rotational velocity and apsidal motion determinations when available, and we compute a number of other physical parameters, notably luminosity and distance. These accurate physical parameters reveal the effects of stellar evolution with un- precedented clarity, and we discuss the use of the data in observational tests of stellar evolution models in some detail. Earlier findings of significant structural differences between moderately fast-rotating, mildly active stars and single stars, ascribed to the presence of strong magnetic and spot activity, are confirmed beyond doubt. We also show how the best data can be used to test prescriptions for the subtle interplay be- tween convection, diffusion, and other non-classical effects in stellar models.
    [Show full text]
  • Appendix: Spectroscopy of Variable Stars
    Appendix: Spectroscopy of Variable Stars As amateur astronomers gain ever-increasing access to professional tools, the science of spectroscopy of variable stars is now within reach of the experienced variable star observer. In this section we shall examine the basic tools used to perform spectroscopy and how to use the data collected in ways that augment our understanding of variable stars. Naturally, this section cannot cover every aspect of this vast subject, and we will concentrate just on the basics of this field so that the observer can come to grips with it. It will be noticed by experienced observers that variable stars often alter their spectral characteristics as they vary in light output. Cepheid variable stars can change from G types to F types during their periods of oscillation, and young variables can change from A to B types or vice versa. Spec­ troscopy enables observers to monitor these changes if their instrumentation is sensitive enough. However, this is not an easy field of study. It requires patience and dedication and access to resources that most amateurs do not possess. Nevertheless, it is an emerging field, and should the reader wish to get involved with this type of observation know that there are some excellent guides to variable star spectroscopy via the BAA and the AAVSO. Some of the workshops run by Robin Leadbeater of the BAA Variable Star section and others such as Christian Buil are a very good introduction to the field. © Springer Nature Switzerland AG 2018 M. Griffiths, Observer’s Guide to Variable Stars, The Patrick Moore 291 Practical Astronomy Series, https://doi.org/10.1007/978-3-030-00904-5 292 Appendix: Spectroscopy of Variable Stars Spectra, Spectroscopes and Image Acquisition What are spectra, and how are they observed? The spectra we see from stars is the result of the complete output in visible light of the star (in simple terms).
    [Show full text]